Paint Film Adhesion Tester Circle Method 0-10.5mm 80r/min

Product Features & Attributes
This paint film adhesion tester uses the circle tracing method to determine the adhesion of paint films to substrates. It is common testing equipment for coating adhesion in the paint and coating industries.

Working Principle: The test panel is fixed on a movable table. As the table moves, the rotating needle cuts through the paint film in a circle, creating overlapping spiral tracks. The damage to the paint film is caused by both vertical pressure and the torsional force from the needle's rotation. Adhesion is evaluated by the integrity of the paint film within the spiral scratch area, rated by seven grades.

Structure:

• Work table: Movable, stroke 80mm

• Needle system: Rotating motion, drawing diameter 0~10.5mm adjustable

• Weight system: 100~1000g adjustable, controls needle pressure

• Drive system: Motor driven, speed 80r/min

• Lifting device: Controls needle contact and release

Technical Features:

• Circle method adhesion testing

• Adjustable drawing diameter 0~10.5mm

• Adjustable weight 100~1000g

• Drawing pitch 1.5mm

• Table stroke 80mm for standard scratch length

• Manual operation, simple and reliable

Technical Parameters:

• Motor speed: 80r/min

• Overall dimension: 420×170×270mm

Operation Steps:

1. Check needle sharpness (replace if dull)

2. Adjust rotation radius to standard value (5.25mm)

3. Secure test panel on table, lower needle to contact film

4. Rotate handle clockwise evenly (80~100r/min)

5. Scratch length standard 7.5±0.5cm

6. Remove panel, clean debris from scratches

7. Examine with 4x magnifier and rate adhesion

Grading Method:
Examine the upper side of the scratch track. Mark seven positions (1-7) corresponding to seven grades. Check film integrity at each position. If >70% of the film remains intact at a position, it is considered intact.

Precautions:

• Scratch should just penetrate the film; add weight if not reaching substrate

• Grading can start from 7 (inner) or 1 (outer)

• Primer adhesion should reach Grade 1; topcoat adhesion around Grade 2

Maintenance:

• Apply rust preventive oil daily

• Wipe oil, dust, and fingerprints

• Annual inspection

Available in different specifications: different weight configurations (100-1000g, 200-2000g, etc.), different needle types, and different rotation radii to suit various coating types and testing standards.

Mainly used in paint manufacturers, coating contractors, automotive coating industry, furniture manufacturers, quality inspection institutions, research universities, and more for paint film adhesion testing.